Welding-burner.



J. KNAPPICH.

WELDING BURNER.

APYLIGATION FILED rm. 1, 1909.

943,882. Patented Dec. 21, 1909.

` grin-efraim? Wii'nm@ l Jcoir'zzafnfwn /Z/ W Q AT Fon" Eya JACOBKNAPPICH, OF AUGSBURG, GERMANY.

WELDING-BURNER.

Specification of Letters Patent.

Patented Dec. 21, Llll.

Application led February 1, 1909. Serial No. 475,473.

To all whom it may concern:

Be it known that I, J Aicon KNArrioii, managing director, citizen ofGermany, residing at 11 Gesundbrunnenstrasse, Augsburg', in the Kingdomof Bavaria and Empire of Germany, have invented new and usefullmprovements in lVelding-Burners, ot' which the following is aspecification.

The present invention relates to welding laurners and a primary objectis to provide a device for intimately mixing combustible l burner. -Thei i I l gas with the gas supporting combustion in such burners.

In burners used. for welding, so-called welding pistols, it isfrequently necessary to make an intimate mixture of oxygen or air withcombustible gases of different specilic weight, in ordei to obtain awelding flame having a high temperature. It has been found however,particularly in those welding pistols in which the combustible gas at aow pressure is carried along as in an vinjector by oxygen llowing at ahigh pressure through a central nozzle, that these' two gases are notsufficiently intimately mixed withinthe burner. AS is known, such anintimate mixture can be brought about by the gas being compelled torepeatedly change its direction of flow while passing through theburner, .But if this is ellected by plates or the like being arrangedprojecting laterally at intervals in the interior of the welding pistol,at those places where the lplates are situated the passage for the gasis considerably narrowed; the gas is therefore repeatedly throttled andexpanded again, and there are considerable losses of y pressure whichprejudice the etliciency of such welding pistols. If, on the other hand,the repeated change of direct-ion is brought about by arranging a spiralor worm, it`is found that the mixture of gases continuescirculatingafter leaving the spiral or worin. This formation of eddies in the-gaseous n1ix ture, however, prevents a good, well-defined welding conein the flame being formed. In accordance with the present invention allthese defectsare avoided, but nevertheless in welding pistols having aninjector-like action the combustible gas is intimately mixed with thegas which supports the combustion, ,whether oxygen or air. This is4obtained by an eddying motion being first imparted to the gases afterthey meet in the burner, but in doing away with this motion before thegaseous mixture passes out of the gases are intimately mixed by theeddying motion, but owing to the eddies being subsequently stopped theformation ci a sharpwelding cone is possible. TWithin the turns of thespiral the velocities are different; on account of these diilerent ve'-locities of the mixture oit gas and oxygen the-layers of the mixtureflowing through the spiral are displaced, an intimate mixture being, ofcourse, obtained thereby. It the gaseous mixture is divided into severalseparate currents and if a spi'al motion is imparted to the latter,-t'or example by providing in the welding pistol a worm or spiral havingmore than one thread, when uniting again in the burner-tube the currentswill whirl through one another; this causes the particles of gas to beintimately miied` it is true', but it renders the vformation of a sharpwelding cone more dillicult without the provision of special deviceswhich do away with the eddies.

ln order that the invention may be clearly understood reference will bemade to the accompanying drawing in which one constructional t'orin olEa mixing` device for welding burners is represented by way olf example,and in which:

Figure l is a rcrtical section through a welding pistol, and Fig. 2 is across-section in the plane a7j in Fig. l.

Referring to the drawing,'the gas, pre terably oxygen, used forsupporting combustion and flowing under pressure through the pipe i2,when emitting from the nozzle 3 carries with it the combustible gas at aless pressure from the pipe l. The mixture ol gases then enters into themixing chamber #t in the burnertnbc l0. ln the mixing chamber there isprovided a worm or spiral 5 haring several threads, so that the gaseousmixture is compelled to divide into several currents and lto flowthrough the spiral or worm with a spiral motion. 'Vhcn leaving thespiral the circulating currents of gas meet in the cliamber-lile space'Sand the eddying currents here cause the particles of gas to mix stillmoreJ intimately. The eddying currents then hit against a metal meinber7 which has two passages i), through which the currents of gas pass. Theeddy ing or whirling motion is stopped in this' manner, so that themixture of gas and oxygen flows on in a straight line and emits dfi-omthe nozzle 6, in front of which a sharply defined welding cone forms.

The chamber-.like space between the spiral and the device for stoppingthe eddying m0- tion can be made larger or smaller than repranged in thepistol in such a manner that it is able to rotate around its own axisandthus be rotated at a high speed by the pressure of the gaseousmixture as in a turbine.

What I claim as my invention and desire to secure by Letters Patent is:y

l. In a Welding burner, the combination, with. the vburner-tube having amixing Chamber, of a Worm or spiral having a plurality of threads insaid vChamber, land means in said burnerstube at an adjustable distancein lfront of said Worm or spiral for stopping the eddying'.` motion ofgases passing through the latter. l Y

2. In a Welding burner, the combination, with the burner-tube having amixing Chamber, of a Worm or spiral having a plurality of threads insaid chamber, and'walls ar# ranged transversely in said burner-tube infront of said Worm or spiral for stopping the eddying motion of gasespassing through the latter.

my hand 1n presence of two subscribing Witnesses,

JACOB KNAPPICHQ Witnesses LoUrs MUELLER, ABRAHAM SCHLESINGER.

